All tumor markers were within normal limits: CEA, 1.7 ng/mL; CA19-9, 26 U/mL; cancer antigen 125, 16 U/mL; squamous cell carcinoma antigen, 1.2 ng/mL; and alpha-fetoprotein, 3 ng/mL. This evidence concerns the gene CEACAM5 and neoplasm.